<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <title>React 实例</title>
    <script src="https://cdn.staticfile.org/react/16.4.0/umd/react.development.js"></script>
    <script src="https://cdn.staticfile.org/react-dom/16.4.0/umd/react-dom.development.js"></script>
    <script src="https://cdn.staticfile.org/babel-standalone/6.26.0/babel.min.js"></script>
</head>
<body>
<div id="example"></div>

<script type="text/babel">

    class HelloMessage extends React.Component {
        constructor(props) {
            super(props);
            this.state = {value: 'Hello Runoob!'};
            this.handleChange = this.handleChange.bind(this);
        }

        handleChange(event) {
            this.setState({value: '菜鸟教程'})
        }
        render() {
            var value = this.state.value;
            return <div>
            <button onClick={this.handleChange}>点我</button>
            <h4>{value}</h4>
            </div>;
        }
    }
    ReactDOM.render(
    <HelloMessage />,
            document.getElementById('example')
    );
</script>

</body>
</html>